Frequency Central Little Melody Build Documentation

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Frequency central
Build documentation for:
Little Melody
Featuring code by Jetroid
Main PCB
Little Melody is a generative sequencer based around clock divisions and a chromatic
quantiser, used to create in-the-moment licks and riffs. It is more that the sum of it's parts.
Little Melody's internal operations can be considered as 4 clock dividers patched into a CV
mixer via attenuators. The attenuators select notes over a 5 octave range, the clock dividers
determine how often those notes are added to the mix. The final output of Little Melody is
quantized chromatically for fast set up and continuously pleasing results.
The 4 clock dividers are labelled A, B, C, and D. They all receive clocks from the same source,
the divisions may be selected using the presets and the individual division selectors. The
clock dividers can be set to count up, down, or to one of a variety of modes that move
between counting up and down.
For further information see the Little Melody User Guide.

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Summary of Contents for Frequency Central Little Melody

  • Page 1 The attenuators select notes over a 5 octave range, the clock dividers determine how often those notes are added to the mix. The final output of Little Melody is quantized chromatically for fast set up and continuously pleasing results.
  • Page 2 Key to PCB screen print: n: This signifies NPN BC547 transistors. Note the correct pinout as shown by the half circles. Please observe the correct polarity for all ICs, voltage regulators, diodes and electrolytic capacitors. Bill of Materials 330R x 1 10nF x 2 TOOL PIC B100K x 2...
  • Page 3 Main PCB assembly 1. One 100nF capacitor is replaced by a jumper – do this first (see photo below) 2. Solder the diode and all resistors 3. Solder all four IC sockets 4. Solder the non elecrolytic capacitors 5. Solder the 78L05 and BC547s– watch the polarities! 6.
  • Page 4 Control PCB It’s quite important to follow this sequence! 1. Place the PCB on a flat surface. Place the 2 tactile switches into their solder pad. Do not push them all the way through, they should sit proud of the PCB (see photo), their legs should not protrude through the other side.
  • Page 5 (ie ground), connect the red probe to the tip of the patch cable (I find a couple crocodiles can help here) 5. Set the DMM to read DC voltage. 6. Adjust the trimmer on the back of Little Melody until the DMM reads 5.00V. All done! Go be generative! RDH 24/07/20 http://www.frequencycentral.co.uk/...

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